Re: New gas leak

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Posted by K.LaRue-VA on June 09, 2020 at 07:30:45 [URL] [DELETE] :

In Reply to: New gas leak posted by Frank (WNY) on June 08, 2020 at 16:22:19:

1 - Plumbing is my least favorite repair.
2 - New always seals best to new.
3 - Make sure you can see exactly where the leak is coming from. A leak near the top of anything can run just about anywhere before it drips and may even seem to defy gravity.
4 - Tapered threads at tank and valve assembly should seal with no sealant required. The threads on both parts need to be completely clean for that to work. I usually use some sealant for fuel/gas systems. White teflon is for water and won't work for fuel.
5 - Flare fittings need to be clean and assembled straight. If they still won't seal with moderate tightness, take apart and look for a crack where the metal was folded to make the flare. Look at the seat area and make sure that is clean and smooth. If flare or seat is cracked, corroded, or dented by assembling crooked, it's junk.
6 - Shaft for valve should have a packing nut. Those often come loose in shipping or are just assembled loose. Packing nut should be tight enough to seal, but valve should still turn easy.
7 - Use a new seal for the glass fuel bowl. There are some that seem to seal better than the original plain cork, but the cork ones have worked for many years.

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